I think if you were to run the car on 99 and have it custom remapped entirely on the dyno with a decent piggyback ECU you could escape knocking. Question is, how much power would you have to sacrafice with the richer fuel/air ratio required to run 99?
Are these chargers aftermarket or do they come standard on any cars, just wondering if I can get one from salvage.
I will ask my tuning place next time I see them for a labour quote + ecu and their opinion on expected gains etc. They are working on my supercharged mini at the moment and doing a very nice job. Maybe they'll offer a discount on 2 conversions! They charged £600+vat labour for the mini, so im hoping not more than £2000 for the GTV and I know they would do a good job through experience with them. Probably be seeing them sometime next week so I will let you know.
The mini will be 8.2:1 but effective compression 13.5:1 (no air cooling), Im hoping they can do a good enough job with the Weber carb to run 97-99 well.
I found an article on Autodeltas Gt which they run at 5psi, I also found a calculator that would suggest 5psi on the 3.0 v6 running on 96 octane fuel would give around 295bhp which, co-incidently, is what the c30-94 is quoted as giving the v6 on the rotrex website. The article also says that the Gt is intercooled, it seems that at that psi an intercooler is not usually necessary so maybe it is there to help avoid detonation by cooling the charge ? The same calculator suggests that at 9psi, one degree retardation will offset detonation... although its not taking into account the already high compression, for reference, 6 degrees retardation would seem to reduce the output by approx 30bhp..
I think they are purely aftermarket, there are a couple of sites that sell them, around £1600 new I think.. I am having a look for an intercooler at the moment, and trying to work out where it could go on the front without looking too obvious (unless I can get it anodised black)
It would be nice to think that 5psi boost, an intercooler, 99 fuel and a dyno remap would avoid knock... May need an expert opinion on that though
Yes, very interested to hear what your place has to say regarding cost etc.. It would be much more simple to get everything done together at once.. My clutch release bearing is starting to play up a little so I'm thinking about getting that done aswell, Alfaholics single mass replacement kit seems a good item, and then of course some would say to get the lsd fitted at the same time which would come to around an extra grand with labour etc With regards to your Mini, from what I read, carb engines can deal with higher compression so should be ok I guess..
Out of interest, I dont suppose you or anyone else is interested in some nearly new Koni adjustable shocks with -35mm springs for a V6 (35mm mounting bracket and antirollbar fixing brackets)? I have -50mm springs at the moment but still not sitting where I want it to so FK Konigsport coilovers seems the only option left now..